Abstract: The factors affecting the stability of corundum-based water borne spraying coatings for foundry were studied based on the investigation of refractory filler，thickener， suspension agent，binder and dispersant as well as the testing of the static stability，dynamic stability and filtration performance of the coatings.The results showed that the types of corundum materials，thickener（hydroxypropyl methyl cellulose）， suspension agent（attapulgite）， binder（polyvinyl alcohol）， dispersant（sodium methylene dinaphthalene sulfonate）all affected the stability of corundum-based waterborne spraying coatings，among which corundum material and thickener content were found the most significant factors. Considering the static anddynamic stability，the corundum-based waterborne spraying coatings with good static stabilityand dynamic stability could be obtained by use of tabular corundum as refractory filler and 0.7% of hydroxypropyl methyl cellulose，5% of attapulgite as suspension agent，1.5% of polyvinyl alcohol as binderand 0.4% of sodium methylene dinaphthalene sulfonate as suspension agent.

Key words: foundry coating, waterborne spraying coating, alumina-based coating, static stability, dynamic stability

摘要： 通过对耐火填料、增稠剂、悬浮剂、粘结剂、分散剂的考察以及对涂料静态稳定性、动态稳定性、过滤性能的测试，研究了铸造用刚玉基水性喷涂涂料稳定性的影响因素。研究表明：刚玉材质种类、增稠剂（羟丙基甲基纤维素）、悬浮剂（凹凸棒土）、粘结剂（聚乙烯醇）、分散剂（亚甲基双萘磺酸钠）均影响刚玉基水性喷涂涂料的稳定性，其中刚玉材质以及增稠剂加入量是最显著影响因素。综合静态稳定性与动态稳定性的最优指标，选取耐火填料为板状刚玉粉、 5%凹凸棒土悬浮剂、 0.7%羟丙基甲基纤维素、 1.5%聚乙烯醇粘结剂、 0.4%亚甲基双萘磺酸钠分散剂，可以得到具有良好静态稳定性及动态稳定性的刚玉基水性喷涂涂料。

关键词: 铸造涂料, 水性喷涂涂料, 刚玉基涂料, 静态稳定性, 动态稳定性

CLC Number: 

• TQ630. 7+ 9